h1 {
  background-color: blueviolet;
}

#box1 {
  width: 100px;
  height: 100px;
  background-image: url('../imgs/1.jpg');
  display: flex;
  backface-visibility: unset;
}

#box2 {
  width: 100px;
  height: 100px;
  background-image: url('../imgs/2.jpg');
  display: flex;
  backface-visibility: unset;
}